The nuclear ring of the barred galaxy NGC 4314

Details The nuclear ring of the barred galaxy NGC 4314 The nuclear ring of the barred galaxy NGC 4314

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...244..257g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 244, no. 2, April 1991, p. 257-272. Research supported by CONACYT, American As

Astronomy and Astrophysics

Astronomy

43

Barred Galaxies, Galactic Nuclei, Galactic Structure, Peculiar Galaxies, Continuous Spectra, Hydrogen Atoms, Infrared Photometry, Near Infrared Radiation, Radio Astronomy, Ubv Spectra

Scientific paper

Observations of the barred spiral galaxy NGC 4314 in the CO(1-0) and (2-1) lines, 21-cm H I line, radio continuum, visible, and near infrared are reported. The observations indicate that NGC 4314 is highly deficient in H I (the H(2)/H I mass ratio is 60/1), while CO observations show abundant molecular gas near the center of the galaxy. The VLA observations of the radio continuum, as well as the optical images demonstrate that the concentration of molecular gas has produced massive stars ionizing H II regions in a circumnuclear ring. It is suggested that explosions of these massive stars generate the relativistic particles emitting nonthermal radio radiation in the ring. Near-infrared photometry of the inner region is utilized in the estimation of the mass-to-two-micron luminosity ratio interior to the ring.

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